Mustard Seed
Mustard seeds are the small round seeds of the mustard plant, used whole, tempered in oil, or ground into powder, and they're the raw material behind prepared mustard itself. Yellow, brown, and black varieties span everything from Indian tempering to French condiments.
How to buy
Buy whole seeds rather than pre-ground mustard powder for a longer shelf life and more versatile uses. Look for plump, uniform seeds without a lot of dust or broken husks, ideally from a bulk bin or spice shop with good turnover. Black and brown seeds are noticeably more pungent than mild yellow (white) seeds.
How to store
Keep whole seeds in an airtight container in a cool, dark pantry, where their sealed husks protect the pungent oils inside and let them stay potent for a year or more. Ground mustard fades faster, within a few months, so store it airtight and away from heat and light as well.
Culinary profile
- Flavor
- Whole seeds taste mild and faintly bitter until they're cracked, toasted, or crushed with liquid, which unlocks their sharp, horseradish-like heat. Tempering seeds in hot oil mellows that sharpness into a nutty, toasty flavor, while crushing seeds with water or vinegar produces the familiar pungent bite of prepared mustard.
- Texture
- Small, round, and hard when whole, with a satisfying crackle and pop when tempered in hot oil. Ground into a paste, they range from smooth to coarse depending on how finely they're crushed, which is what gives whole-grain mustard its characteristic texture.
- Aroma
- Mild and grassy when whole and uncrushed; toasting in oil brings out a nutty aroma, while crushing with liquid releases a sharp, sinus-clearing pungency.
How to prepare
- Tempered (tadka) — Sizzled in hot oil or ghee until they pop, releasing a nutty flavor as the base for many Indian dishes.
- Ground into powder — Pulverized for use in dry rubs, marinades, and quick vinaigrettes.
- Cracked into paste — Crushed but not fully pulverized, giving whole-grain mustard its textured bite.
- Pickled whole — Brined and used as a crunchy, tangy garnish in relishes and pickles.
Classic dishes
American
- Chow chow relish — A Southern green-tomato relish seasoned with whole mustard seed.
- Classic dill pickles — Cucumber pickles that commonly include mustard seed as part of the pickling spice blend.
- Honey mustard dressing — A grainy mustard whisked with honey and vinegar into a tangy-sweet dressing.
Indian
- Tadka dal — Lentils finished with mustard seeds popped in hot ghee along with cumin and curry leaves.
- Sambar — A tangy lentil-vegetable stew that starts with mustard seeds tempered in oil.
- Rasam — A peppery, tamarind-soured soup tempered with popped mustard seeds and curry leaves.
- Bhindi masala — An okra curry that begins with mustard seeds crackling in hot oil.
- Avial — A South Indian mixed vegetable stew finished with coconut oil and tempered mustard seeds.
- Poriyal — Stir-fried vegetables tempered with mustard seeds, lentils, and coconut.
- Kasundi — A pungent fermented Bengali condiment made from ground mustard seeds and green mango or chile.
- Aam ka achaar — A mango pickle built on mustard oil and tempered whole mustard seeds.
French
- Whole-grain mustard — A coarse, textured prepared mustard made by lightly crushing rather than fully grinding the seeds.
German
- Senfgurken (mustard pickles) — German pickled cucumbers flavored heavily with mustard seed.
Cajun & Creole
- Remoulade — A Creole sauce that often leans on whole-grain mustard for texture and sharpness.
British & Irish
- Piccalilli — A mixed vegetable pickle studded with whole mustard seeds for color and bite.